Steam-boiler



W. S. FISKE. Steam-Boiler;

. Patent e d Feb. 24,1 80;

INVENTORV d; aid/(:9

zi ATTORN EY N-PETERS. FHOTO LITHOGRAPHER, WASHINGTON. D, O.

Y UN S Ti'PiATENiT UFFI E- STE-AM- BOILER.

1 SPECIFICATION forming part of =Letters"1 ate nt' N0. 224,890, datedFebruary 24, 1880.

Application filed December 15, 1879;

To all whom it may concern Be it known that I, WILLIAM S. FISKE, of

Stamford, in. the county of Fairtield and State hereby declare that. thefollowing is a full,

clear, and exact description of the construction and operation of thesame, reference being had to the annexeddrawings, making a part ofthisspecification, and to the letters and figures of referencemarkedthcreon.

Figure l of the drawings is a representation of a central verticalsection of this invention. Fig. 2 is a'vertical section showing theexterior water-connection. Fig. 3 is a sectional view of the connectingwater-tubes between the boilers. Figs. 4 and 5 are horizontal sections.

This invention has relation to steain-boilers; and it consists in theconstruction and novel arrangement, in combination, of two separate butconnected boilers, one acting principally as a generator of steam andthe other acting chiefly as a holder of steam and water, the v lines ofthe generating-boilerbeing placed far below the waterline, and strongtubular water,

connections beingplaced between the two boilers.

It also consists in the construction and novel arrangement of thetubular water-connections, the nettings or perforated plates thereof,and the external safety-connection, all as hereinafter shown anddescribed.

In the accompanying drawings, the letter A designates the outer wall ofthe boiler or the 'wall of the boiler-case. B represents the firebox,and O the lower or generating boiler, having through it the uprightflame-fines a. D is an intermediate space extending horizontally betweenthe two boilers, and E is the upper boiler, supported within the wall A,and having in it or around it a flue-space, b, for the passage of theheated products of combustion.

Usually the fire-box is built up within the lower boiler, so that itsouter portion extends downaround the said box, the case-wall A formingthe outer wall of this boiler; but, if preferred,this lower boiler maybebuilt en tirely above the firebox. Between the two boilers are arrangedthe water-connections c,

1 which are tubular in form and pass through the horizontal flue-spaceD.

. The general water-line of the boiler is indicated bythe dotted line y,and it will at once be apparent thatin this arrangement the flamefluescare far below this line. The connections a, which form the watercommunication between the two boilers, are designed to be larger indiameter than the flame-fines, and are preferably of the constructionshown, in order to insure perfect joining. Holes (1 d of proper diameterare formed in the bottom head of the upper or holding boiler and in thetop head of the hole in the headot' the upper boiler is passed a tubularsection, 6, having ashoulder, f, on which the head rests, and above andbelow this shoulder external threads, 9 and h, and a convex-beveledlower margin, 70, which fits the concave-beveled upper edge, It, of thethe hole in the head of the lower boiler. This section 0 is made with amarginal flange, 1, below which is a shoulder, f, which rests 'on thehead, and an external thread, g, is formed on that portion of thesection which extends below the head to receive a screw-collar, m,having an inner wedging-lip, n, which is forced against the margin ofthe hole in the head from the under side and draws down the shoulder fabove, thereby forming a secure joint in this head.

In the head of the upper boiler a screw-collar, .m, having an innerwedging-lip, n, engagesthe thread 9 of the section 0, and being manner.The edges 70 and 7c of the sections are drawn forcibly together byacoupling-collar, 8, having a thread, It, to engage with the lowerthread, h, of the upper section and an internal flange, l, to engagewith the marginal flange Z of the upper section.

In the connection is secured, bymeans of an inner ring, 1", a diaphragm,p, of wire-netting or perforated metal. Upon the strength and securityof these water-connections and their capacity for ready adjustmentdepends much of the usefulness of this boiler. The perforated diaphragmserves to prevent priming or foaming.

the lower or steam-generating boiler. Through lower section, 6, which ispassed downward in h forced home forms a tight joint in a similar 7 Frepresents the exterior pipe connecting the two boilers, running fromthe lower part of the upper one to the lower part of the lower one. Thiscarries down from the upper boiler any overflow from the lower orgenerating boiler, and thus serves as a safety-pipe.

This boiler is designed to be strong, durable, and safe, and it will bevery effective, although economical in construction.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s-

1. The steamboiler consisting of an upper steam and water holdingboiler, E, heated by the products of combustion passing through thehorizontal flue-space D and vertical fluespaces, tubularwater-connections 0, below the water-line, and passing throughthehorizontal flue-space D, the perforated diaphragms in said connections,and the steam-generating boiler 0, below the water-connections, andseparated from the upper boiler, E, by the fluespace D, all constructedand arranged to operate as shown and described.

2. The steam-boiler consistingof the upper and lower separate boilers, Eand O, separated by a horizontal flue-space, D, and connected by theadjustable tubular water-connections c, passing through said flue-space,and the exterior water-connection, F, acting as a safetypipe,substantially as specified.

3. The combination, with the upper boiler, E, and the lower boiler, 0,below the waterline, and separated from the upper boiler by anintermediate horizontal flue-space, of the shouldered and threadedtube-sections e e, the screw collars m m, and the threaded and ifliangedcoupling-collars, substantially as speci- In testimony that I claim theabove I have hereunto subscribed my name in the presence of twowitnesses.

H. A. TYLER, JOHN SCHADE.

